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Table 1 Patient characteristics at baseline

From: Do changes in pulse pressure variation and inferior vena cava distensibility during passive leg raising and tidal volume challenge detect preload responsiveness in case of low tidal volume ventilation?

  Preload responders (n = 15) Preload non-responders (n = 15) p value
Age (years) 63 ± 18 70 ± 10 0.37
Male gender (n, %) 12 (80.0) 11 (73.3) 0.32
SAPS2 52 ± 15 56 ± 14 0.29
Mortality (n, %) 7 (46.7) 6 (40.0) 1.00
Septic shock (n, %) 11 (73.3) 12 (80.0) 0.14
Cardiogenic shock (n, %) 2 (13.3) 2 (13.3) 0.55
Hypovolemic shock (n, %) 1 (7.2) 1 (7.2) 1.00
Vasoplegic shock (non-septic) (n, %) 1 (7.2) 0 (0.0) 0.12
CRRT (n, %) 3 (20.0) 4 (26.7) 0.18
ARDS (n, %) 6 (40.0) 5 (33.3) 0.47
Lactate (mmol/L) 1.8 ± 0.6 1.3 ± 0.6 0.88
PaO2/FiO2 228 ± 105 276 ± 105 0.55
PEEP (cmH2O) 10.7 ± 3.6 10.4 ± 3.0 0.63
Crs (mL/cmH2O) 31 ± 12 32 ± 13 0.66
Acute cor pulmonale (n, %) 0 (0.0) 0 (0.0) 1.00
LVEF (%) 45 ± 9 49 ± 11 0.67
Patients receiving norepinephrine (n, %) 15 (100.0) 15 (100.0) 1.00
Dose of norepinephrine (µg/kg/min) 1.2 ± 0.6 0.6 ± 0.4 0.02
  1. P values in bold: < 0.05
  2. ARDS acute respiratory distress syndrome, CRRT continuous renal replacement therapy, Crs compliance of the respiratory system, LVEF left ventricular ejection fraction, PaO2/FiO2 ratio of the arterial oxygen partial pressure over the oxygen inspired fraction, PEEP positive end-expiratory pressure, SAPS simplified acute physiologic score